24 citations · 103 across the 12 of their papers we have counts for
12 papers
Designing Optically Addressable Nitrogen-Vacancy Centers in Ultra-Small Nanodiamonds: Insights from First-Principles Calculations
Arpan Kundu, Francesco Martinelli, Giulia Galli
Ultrasmall nanodiamonds (USNDs) are promising platforms for fluorescent and quantum sensing applications. Here we present first-principles electronic structure calculations of colo…
Nuclear Quantum Effects on the Electronic Structure of Water and Ice
Margaret Berrens, Arpan Kundu, Marcos F. Calegari Andrade +3
The electronic properties and optical response of ice and water are intricately shaped by their molecular structure, including the quantum mechanical nature of hydrogen atoms. In s…
Quantum Vibronic Effects on the Excitation Energies of the Nitrogen-Vacancy Center in Diamond
Arpan Kundu, Giulia Galli
We investigate the impact of quantum vibronic coupling on the electronic properties of solid-state spin defects using stochastic methods and first principles molecular dynamics wit…
A Brief Review on the Asymptotic Symmetries of Gravity in Higher Dimensions
Arpan Kundu
In this brief review, we report on the status of asymptotic symmetries of gravity corresponding to the class of metrices named asymptotically flat spacetimes in higher (d > 4) dime…
Quantum vibronic effects on the electronic properties of molecular crystals
Arpan Kundu, Giulia Galli
We present a study of molecular crystals, focused on the effect of nuclear quantum motion and anharmonicity on their electronic properties. We consider a system composed of relativ…
Generalized BMS algebra in higher even dimensions
Chandramouli Chowdhury, Anupam A. H., Arpan Kundu
We revisit the status of asymptotic symmetries in higher even dimensions and propose a definition of superrotation charge beyond linearized gravity. We prove that there is a well-d…
Computational protocol to evaluate electron-phonon interactions within density matrix perturbation theory
Han Yang, Marco Govoni, Arpan Kundu +1
We present a computational protocol, based on density matrix perturbation theory, to obtain non-adiabatic, frequency-dependent electron-phonon self-energies for molecules and solid…
Combined first-principles calculations of electron-electron and electron-phonon self-energies in condensed systems
Han Yang, Marco Govoni, Arpan Kundu +1
We present a method to efficiently combine the computation of electron-electron and electron-phonon self-energies, which enables the evaluation of electron-phonon coupling at the $…
Quantum vibronic effects on the electronic properties of solid and molecular carbon
Arpan Kundu, Marco Govoni, Han Yang +3
We study the effect of quantum vibronic coupling on the electronic properties of carbon allotropes, including molecules and solids, by combining path integral first principles mole…
Generalized BMS Algebra at Timelike Infinity
Anupam A H, Aniket Khairnar, Arpan Kundu
BMS group (and it's various generalizations) at null infinity have been studied extensively in the literature as the symmetry group of asymptotically flat spacetimes. The intricate…
Double Soft Graviton Theorems and BMS Symmetries
Anupam A. H, Arpan Kundu, Krishnendu Ray
It is now well understood that Ward identities associated to the (extended) BMS algebra are equivalent to single soft graviton theorems. In this work, we show that if we consider n…
Magnetothermoelectric effects in graphene and their dependence on scatterer concentration, magnetic field and band gap
Arpan Kundu, Majed Alrefae, Timothy S. Fisher
Using a semiclassical Boltzmann transport equation (BTE) approach, we derive analytical expressions for electric and thermoelectric transport coefficients of graphene in the presen…